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Home >> Chevrolet >> 2001 >> Prizm Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 1.8L >> Diagnostic Tests >> DTC P0420: Catalyst System Low Efficiency >> Code Enable Criteria

Code Enable Criteria

Conditions for running DTC:

Conditions for setting DTC; HO2S 2 signal is as active as HO2S 1 signal.